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* [gcc(refs/users/guojiufu/heads/guojiufu-branch)] check EDGE_FALSE and update number insn checking later
@ 2021-06-09 5:27 Jiu Fu Guo
0 siblings, 0 replies; only message in thread
From: Jiu Fu Guo @ 2021-06-09 5:27 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:dfce3dcf332789b9685888bc22bca960d3455de9
commit dfce3dcf332789b9685888bc22bca960d3455de9
Author: Jiufu Guo <guojiufu@linux.ibm.com>
Date: Wed Jun 9 11:31:48 2021 +0800
check EDGE_FALSE and update number insn checking later
Diff:
---
gcc/tree-ssa-loop-split.c | 23 ++++++++++++++---------
1 file changed, 14 insertions(+), 9 deletions(-)
diff --git a/gcc/tree-ssa-loop-split.c b/gcc/tree-ssa-loop-split.c
index 9c0de66e288..ca35eee21b7 100644
--- a/gcc/tree-ssa-loop-split.c
+++ b/gcc/tree-ssa-loop-split.c
@@ -1618,7 +1618,7 @@ get_ne_cond_branch (struct loop *loop)
continue;
gcond *cond = as_a<gcond *> (last);
enum tree_code code = gimple_cond_code (cond);
- if (!(code == NE_EXPR
+ if (!((code == NE_EXPR && (e->flags & EDGE_FALSE_VALUE))
|| (code == EQ_EXPR && (e->flags & EDGE_TRUE_VALUE))))
continue;
@@ -1810,24 +1810,29 @@ The loop with "i<N" is in favor both GIMPLE and RTL passes. */
static bool
split_loop_on_ne_cond (class loop *loop)
{
+ edge branch_edge = get_ne_cond_branch (loop);
+ if (!branch_edge)
+ return false;
+
int num = 0;
basic_block *bbs = get_loop_body (loop);
+ for (unsigned i = 0; i < loop->num_nodes; i++)
+ num += estimate_num_insns_seq (bb_seq (bbs[i]), &eni_size_weights);
- if (!can_copy_bbs_p (bbs, loop->num_nodes))
+ if (num > param_max_peeled_insns)
{
free (bbs);
return false;
}
- for (unsigned i = 0; i < loop->num_nodes; i++)
- num += estimate_num_insns_seq (bb_seq (bbs[i]), &eni_size_weights);
+ if (!can_copy_bbs_p (bbs, loop->num_nodes))
+ {
+ free (bbs);
+ return false;
+ }
free (bbs);
- if (num > param_max_peeled_insns)
- return false;
-
- edge branch_edge = get_ne_cond_branch (loop);
- if (branch_edge && split_ne_loop (loop, branch_edge))
+ if (split_ne_loop (loop, branch_edge))
return true;
return false;
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